knowledge level

A level of description of the
knowledge of an agent that is independent of the agent's
internal symbol-level representation. Knowledge can be
attributed to agents by observing their actions. An agent
"knows" something if it acts as if it had the information and
is acting rationally to achieve its goals. The "actions" of
agents, including knowledge base servers and knowledge-based
systems, can be seen through a "tell and ask" functional
interface, where a client interacts with an agent by making
logical assertions (tell), and posing queries (ask).